Paper box



(N'o Model.)

I'. R. DUCK.

PAPER BOX.

IINTTan STATES FATaNT Ormea,

FRANCIS R. DUCK, OF CHICAGO, ILLINOIS.

PAPER BOX.

SPECIFICATION forming part of Letters Patent No. 266,445, dated October 24, 1882.

Application tiled September 1S, 188:2. (No model.;

To all whom it may concern Be it known that I, FRANCIS R. DUCK, of Chicago, in the county ot Cook and State of Illinois, haveinvented certain new and useful Improvements in Iaper Boxes; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specitication.

rIhis invention relates to that class of boxes and covers made from paper or other substance in sheet form, and in which the side or sides and ends are formed of the same. sheet with the bottom or top, and in which the adjacent sides are locked together at the' corners'to retain them in position when the box is formed. The object of this general construction in boxes is primarily to permit the boxes to be shipped in knockdown77 form, or with the sides lying flat or in the same plane with the bottom. It is therefore necessary that the interlocking devices by which the sides are joined and held shall form a connection easily made by the purchaser, and it is also desirable that the connection made thereby shall be strong and permanent. Most of the locked-corner 7 boxes heretofore made are defective in one or both of these requisites; and it is the object of this invention to improve this class of boxes in these particulars.

To this end the invention consists in the features of construction hereinafter set forth, and pointed out in the appended claims.

In the accompanying drawings, Figure l is a fragmentary plan view of the blank or sheet irom which the box is to be made, showing the form of cut made at the corner of the sheetto allow the side and end to be joined according to my invention. Fig. 2 is a perspective view ot' the box made from the blank of Fig. l, and having its sides and ends joined as proposed in my invention. Fig. 3 is a horizontal section through the joined parts.

A is the sheet, usually of paper, creased in the lines a a, and severed or cut through in the line b c to allow the parts B and C to be upwardly folded to form an end and side of the box. The part B is also scored or creased in the line b d to allow the corner-piece D to be bent around outside and against the part C when these two parts are brought into vertical position. As a means ot' fastening the parts B and C together to form the end and side of the box, the corner-piece D, continuous with B, is cutaway at e e to leave a tongue, E, and the adjacent part C is provided with a vertical slot, F. rlhe tongue Eis thrust inwardly through the slot F, and its end is then returned or folded back toward the part B, to which it belongs, and is fastened down against the inner face ot' the part C by any suitable means. For the purpose ofsecuring the end of the ton-gue in this backwardly-tblded position an eyelet, a rivet, ora clinched tack may be employed, being made to pass through the three thicknesses of material produced by the overlapping and folding of the parts, as described; but I prefer to generally fasten the end of the tongue in its backwardly folded position by providing a second vertical slot, G, between the slot F and the adjacent end of the side C in position to allow the end of the tongue to be tucked through the saine, as shown in Figs. 2 and 3. The tongue thus returned or bent backward and secured, after being passed through the slot F, forms a hook of great strength, and not calculated to be detached or loosened by handling of the box in use. In the ease ot' deep boxes two or more tongues, E, and corresponding slots may be provided.

The part or flap D should preferably be left of the full width of the box-side as far back as the slot G, (or only beveled at d,) as shown in Figs. l and 2, in order to presentl shoulders e e at the base of the tongue, which act as supports to prevent the latter from being forced into the slot F farther than is necessary to bring the end of the side C against the inner surface of the adjacent side or end B. In this construction the end of the tongue can never be pushed out of the slot G by the collapse of the box, and the connection is rendered firmer and more permanent. In order 9 that the fold in the tongue may be made at the proper point to draw the end firmly against` the side of the box, said tongue may be advantageously creased in the transverse dotted line near its base. (Shown in Fig. 1.)

lOO

The invention may ot' eourse be applied to t'ortli, the flap I), provided with a shoulder or the covers as well as the bodies of boxes.

I claim as my invention- 1. In a box having its sides ot' the same piece with the bottom, one of said sides provided with a slot, F, and the adjacent side provided with atong'ue, E, said tongue being inserted through the slot and returnedand secured, substantially as and for the. purposes set forth.

2. In a box having its sides ot' the saine piece with the bottoni, one ot said sides provided \\ith the slots F and G, and the adjaeent side provided with a tongue, E, said tongue being inserted through the slot F and returned and tucked through the slot G, substantially as described, and for the purposes set forth.

3. In a folded box having' a tongue, E, upon one of its sides inserted through a slot in the adjacent side and returned and secured, as set shoulders, e, arranged to bear against the ends ot' the slot when the side C bears with its end against the inner surface. of the side Il, substantiall) as described.

4. The blank shown, havingr the corners eut to t'orm the flap I) and tongue E, and provided with the slots F and G, substantially as described, and for the purposes set forth.

5. The blank shown, havinnnr the tongue E and slot F, said tongue being' transversely scored at a point where it is to be baelitvardly folded at'ter being inserted through the slot, substantially as described.

In testimony that I claim the foregoing as in v invention I affix my signature in presence ot' two Witnesses.

FRANCIS R. DUCK.

Vitnesses:

M. E. DAYTON, PETER J. ELLERT. 

